Carb Timing Doesn’t Matter? What the Research Actually Shows | Tim Podlogar | Ask a Cycling Coach Podcast 582
Ask a Cycling Coach Podcast - Presented by TrainerRoad
TrainerRoad
4.9 • 4.6K Ratings
🗓️ 23 April 2026
⏱️ 58 minutes
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Summary
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// TOPICS COVERED
(00:00:00) Carb Timing Debate: When Should You Fuel on Long Rides?
(00:01:24) Study Overview: Testing Different Carb Timing Strategies
(00:06:09) The Protocols: Progressive vs Constant vs Front-Loaded Fueling
(00:07:37) Key Result: Carb Timing Didn’t Impact Performance
(00:11:37) Why Real-World Racing Masks Fueling Differences
(00:13:09) Practical Takeaway: Total Carbs Matter More Than Timing
(00:21:28) Do Carbs Spare Glycogen? What the Research Actually Shows
(00:24:50) Why Carb Intake Becomes Critical After ~2–3 Hours
(00:31:10) Real-World Application: How Athletes Should Fuel
(00:36:00) Energy Availability & Underfueling Risks in Endurance Athletes
(00:45:08) Leadville Case Study: Fueling for Long, High-Altitude Races
(00:56:16) Final Takeaways: Stop Overthinking Timing, Focus on Execution
In this episode, Coach Jonathan Lee sits down with researcher Dr. Tim Podlogar to unpack one of endurance sport’s most debated topics: carbohydrate timing during long efforts. They break down a controlled study comparing progressive, regressive, and constant fueling strategies over a three-hour variable-intensity ride plus a finishing time trial, revealing that performance didn’t significantly differ as long as total carbohydrate intake was sufficient. The conversation explores why real-world racing dynamics—like surges, terrain, and fueling logistics—likely override precise timing strategies, and why hitting your hourly carb targets matters more than when you take them. They also dive into practical takeaways for cyclists and triathletes, including fueling for long races, individual variability in carb absorption, gut training, hydration challenges, and how to balance energy intake for both performance and health. The key message: focus on consistent fueling, practice your strategy in training, and don’t overcomplicate timing when total intake is what truly drives results.
// RESOURCES MENTIONED
- Free Cycling Nutrition Calculator: https://trainerroad.cc/cyclingnutritioncalculator
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Transcript
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| 0:00.0 | Welcome to the Ask a Cycling Coach podcast presented by Trainer Road. Today we have a researcher with us who not only is in the lab but also in the fields. It's very good to have Dr. Tim Poligar with us again. Tim, how are you? Hi, Jonathan. I'm doing great. How about you? Awesome. Yeah, yeah, doing awesome. Stoke to have you because we're going to review one of your studies that should help all of us cyclists figure out this whole concept of |
| 0:21.9 | timing the carbon take during the ride and maybe shifting it toward the beginning later on or |
| 0:27.7 | evenly spread throughout on a ride which one is better we've seen a lot of different theories on |
| 0:32.5 | this interestingly in the triathlon world there's been a lot of like very practical and |
| 0:37.0 | logical application of carbohydrate timing in the sense that a lot of triathletes, like it's a buffet on the bike. |
| 0:43.3 | Eat as many carbs as you can possibly get down the hatch on the bike because on the run, it's a whole lot harder to get it in. |
| 0:49.7 | And then as cyclists, you also wonder, man, should I take those carbs in and make it so that it increases as later on muscle glycogen starts to disappear? |
| 0:58.3 | Or should I be taking it in earlier on? So then I spare it from the get-go. |
| 1:03.0 | Tons of questions. You guys did some research on, or did some research and published a paper on this. |
| 1:07.5 | It's called No Performance Effects of Altered Carbohydrate Distribution during intense cycling. It was yourself and a whole selection of colleagues that worked on this |
| 1:16.3 | one. And Tim, I just want to allow you to say things in your own words here rather than put words |
| 1:23.2 | in your mouth. What problem were you guys aiming to solve with this research? So yeah, as you |
| 1:28.6 | mentioned, pretty much there are so many ways on how you approach nutrition during the like three, |
| 1:35.2 | four, five hour long ride and so many theories. And you can argue that, yeah, it makes sense to |
| 1:42.7 | just take a gel every 15 minutes, as let's say the |
| 1:48.1 | sports nutrition products are made to take. But then if you start thinking about it more |
| 1:53.0 | scientifically, you might be arguing, oh, let's have more at the start so that you saturate |
| 1:59.8 | the gut and get the carbohydrates into the |
| 2:02.4 | blast stream as quickly as possible, which is what we very often do in actual research when |
| 2:08.3 | we study carbohydrates. |
| 2:11.9 | And then there is another line of thought that kind of I like the most, which was on the start of exercise, you rely |
| 2:19.2 | mostly on stored glycogen. So there is no need for ingested carbohydrates, at least not |
... |
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